<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .container {
        display: flex;
        width: 200px;
        background: #92b1e1;
        background: blue;
    }
    .item {
      flex: 1;
      margin-right: 10px;
      background: red;
    }
    .item1 {
      width: 20px;
      margin-right: 10px;
      background: red;
    }
    .item4 {
      width: 20px;
      margin-right: 10px;
      background: red;
    }
  </style>
 </head>
<body>
  <div class='container'>
    <div class='item1'>item1</div>
    <div class='item'>item2</div>
    <div class='item'>item3</div>
    <div class='item4'>item4</div>
  </div>
</body>
</html>
